What is a MapReduce Combiner?
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What is a "reducer" in Hadoop?
In mapreduce what is a scarce system resource? Explain?
Define MapReduce?
how is data partitioned before it is sent to the reducer if no custom partitioner is defined in Hadoop?
What do you mean by data locality?
what are the basic parameters of a Mapper?
What is the fundamental difference between a MapReduce Split and a HDFS block?scale data processing?
What is the inputsplit in map reduce software?
What is Combiner in MapReduce?
What is the difference between Reducer and Combiner in Hadoop MapReduce?
Why Hadoop MapReduce?
What is an identity mapper and identity reducer?
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